K. Futatsukawa

NKS2 Meeting

2008/10/16

NKS2

Simulation ResultSimulation ResultTracking and Vertex Search

Vertex Search (first point from simulation)

x [cm]

Diff: vx (tracking &vertex search) - dx

Diff: vx (vertex search) - dx

vx : vertex point x dir. from analyzerdx : decay point x dir. from simulation

Tracking is cause,but program resolution of vertex search is not so good

Step Size of Runge-KuttaStep Size of Runge-Kutta

Strongly dependence on step size of Runge-Kutta

Not Only RMS but also Mean, Tail

Vertex Search (first point from simulation)

Simulation ConditionSimulation ConditionTracking and Vertex Search

Vertex Search (first point from simulation)

x [cm]

Diff: vx (tracking &vertex search) - dx

Diff: vx (vertex search) - dx

Simulation Condition : 0.8 < PK0 < 1.1 [GeV/c] 0.5 < cosK0 < 1.0Not So Good

Simulation ConditionSimulation ConditionTracking and Vertex Search

Vertex Search (first point from simulation)

x [cm]

Diff: vx (tracking &vertex search) - dx

Diff: vx (vertex search) - dx

Simulation Condition : 0.8 < E < 1.1 [GeV] Isotropic in CM frame Vacuum of all materialsRunge-Kutta Step Size 1.0

Two peak is distinguished

Step Size of Runge-KuttaStep Size of Runge-Kutta

Step Size 1.0

Step Size 0.5

Step Size 0.25

Step Size 0.1

Simulation Condition : 0.8 < E < 1.1 [GeV] Isotropic in CM frame Vacuum of all materials

Strongly dependence on step size of Runge-Kutta

I think Runge-Kutta : not so bad Interpolate : bad

Vertex Search (first point from simulation)

New Vertex MethodNew Vertex Method

Vertex Search : Runge-Kutta Method

Nearest Points

Pre-Points

Pre-Pre Points

1st Runge-Kutta(ss1.0) : Search the nearest points2nd Runge-Kutta : one more time from pre-pre points using smaller ss

New Vertex MethodNew Vertex Method

Simulation Condition : 0.8 < E < 1.1 [GeV] Isotropic in CM frame Vacuum of all materials

Vertex Search (first point from simulation)

Enough Performance

pre ss0.05

1st Runge-Kutta(ss1.0) : Search the nearest points2nd Runge-Kutta : one more time from pre-pre points using smaller ss

NKS2-2 = NKS3

CAMAC ScalerCAMAC Scaler

1 m

Wanted : No Target, No Radiator Data

Left > RightWhy ???From Upstream, Beam line

#run 2063

[ch]

Not like this !!!

We can’t separate signals from noisesOrNoises level was too less

nois

es

sign

als

Width of Discriminated Signalsabs |falling – rising| Expected Shape

Width : VCWidth : VC

Width%TDC : VCWidth%TDC : VC

X axis : TDC [ch]Y axis : Width [ch]

?…??…….???No Comment !!!

Projection to X dir. in Next Page

ProjectionX : VCProjectionX : VC

X axis : TDC [ch]

W:0~20 W:20~40 W:40~60 W:60~80

W:80~100 W:100~120 W:120~140 W:140~160

W:160~180 W:180~200 W:200~220 W:220~240

W:240~260 W:260~280 W:280~300

?…??…….???In small width region,noise level is larger.

A little …my feeling !!!

Whether we have widths or not,We can’t separate signals from noises.

(in this level)

Width%TDC Vol.2 : VCWidth%TDC Vol.2 : VC

Same graphsFrom ScatterTo Contour

No signals in this region

far from s-wires

Hypothesis :Hypothesis :In the region far from s-wires, the effect of diffusion is large. Large pulses -> Small pulses Small pulses -> Too small pluses, under the Vth

Rising ?, Falling ?, Leading ?, Trailing ?Rising ?, Falling ?, Leading ?, Trailing ?

Rising : fr = 1

Falling : fr = 0

Really ???

One manual : fr=1 : leading edge fr=0 : trailing edge

Other manual : fr=1 : falling edge fr=0 : rising edge

TDC distribution and old data talk : fr=1 : falling edge fr=0 : rising edge

Falling

Rising

I am sorry for having mistake of namein UserDCMonitor.cpp

Bad Boys are this manual and Tsukada-san

HV dependence : TDCHV dependence : TDCHV : 1900 V, Vth : 3 V HV : 2100 V, Vth : 3 V HV : 2000 V, Vth : 2.5 V

Not enough HV ??? More Need ???

Not So BadNot So Bad

#run 2043 #run 2044 #run 2063rising rising rising

falling falling falling

Width%TDC Vol.3 : VCWidth%TDC Vol.3 : VC

HV : 2100 V, Vth : 3 V

Red Region : HV ~2000V, Vth 2.5 V

NOT Modify @HV ～ 2000V, Vth -2.5V

Width%TDC Vol.3 : VCWidth%TDC Vol.3 : VC

HV : 2100 V, Vth : 3 V

… Attention Please !?

Cross-TalkCross-Talk

The channels of no connect to VC don’t have signals

The cross-talk is too less @ASD & AMT-TDC

Channels CorrelationChannels Correlation

AMT20 ch 41 [ch] AMT20 ch 41 [ch]

AM

T20

ch

42

[ch

]

AM

T20

ch

43

[ch

]

Next Channel Next Next Channel

What is this correlation ???

ch42%ch41 ch43%ch41

Channels CorrelationChannels Correlation

AMT20 ch 41 [ch] AMT20 ch 41 [ch]

AM

T20

ch

42

[ch

]

AM

T20

ch

42

[ch

]

Next Channel

Width Cut : Width < 50 ch

Selected Region

ch42%ch41 ch42%ch41

Number of HitsNumber of Hits

B : rising #hitsR : #hits @ width < 50 ch

………… No Comment !!!

Number of Hits @TDC<750Number of Hits @TDC<750

B : rising #hitsR : #hits @ width < 50 ch

Different Shapes !!!

Number of HitsNumber of Hits

Rising

R : #hits @ 1100 < tdc < 800B : #hits @ 300 < tdc < 600

We can’t get the informationform #hits

Event DisplayEvent Display

Just a Moment, Please !!!